Road-grader



(No Model.) y

RM. PENNOGK. ROAD GRADER.

No. 336,821. l Patented Feb. 23, 1886.

(ma e f f wg-ifm@ UNITED STATES PATENT OFFICE.

FREDERICK M. PENNOCK, OF KENNETT SQUARE, PENNSYLVANIA.

ROAD-GRADER.

EBPECFICATION forming part of Letters Patent No. 336,821, dated February 23,1886.

Application filed March 1S, 1885. Serial No. 150,276. (No model.)

To all whom it 71mg/ concern.'

Be it known that I, FREDERICK M. PEN- NocK, a citizen of the United States, residing in the borough ofKennet Square, in the county of Chester and State of Pennsylvania, have invented certain new and useful Improvements in Road-Graders, of which the following is a full, clrar, and exact description, reference being had to the accompanying drawings, of which- Figure l is a plan View, Fig. 2 is an oblique perspective front view, and Fig. 3 is a transverse section, of the scraper bar and scraper on the line of attachment of the rotary colter-wheel.

My invention relates to that class of roadgraders in which a vertically-adj ust-able scraper is suspended diagonally from a two-wheel truck, and the improvements consist in a certain construction or combination of devices whereby the scraper is connected to or with the truck-frame and the tongue of the machine.

The main object of the invention is to simplify and improve the construction of roadgraders of the class hereinbefore mentioned.

Referring to the annexed drawings, in which the same letters of reference always indicate the same or corresponding parts, A is a horizontal frame-work mounted upon and firmly secured to the aXle B of a two-wheel truck.

C is a scraper-bar, to which is secured the scraper D, having, in the present instance, a steel cutting-edge, E, Figs. 2 and 8.

F are two standards or uprights, strongly bolted or otherwise fastened to and near the ends, respectively, of a diagonal cross-piece, a, of the frame A, the rear side of said crosspiece being substantially in the same vertical plane as that of the rear side of the scraperbar. The latter is not connected to the uprights F, but is suspended at each end by two vertical rods, G, Fig. 2, whose upper ends swing from the short arms, respectively, of hand-levers H, which are pivoted upon the sides of the respective standards F. By moving the long arms of these levers the scraper may be moved up and down vertically at either or both ends thereof, and said levers, &c., are retained at various adjustments by means of a hand-catch or sliding bolts on the said levers, whose ends engage with the teeth of rack-bars secured to the cross-piece c. These devices are not new, and require no further description.

' J is the tongue of the maehi ne, which, as more clearly indicated in Fig. l, is firmly secured to the scraper at a point in advance of the line passing transversely through the center of the axle at right angles theretothat is to say, ata point in the forward half of the length ofthe scraper. rlhis is in order to equalize the draft, as the hardest strain obviously co mes upon the leading end of the scraper when doing work. The tongue is braced laterally by means of two brace-bars, K, bolted to the sides ofthe tongue, one of said braces extending to the forward end of the scraper-bar and bolted thereto, and the other to the rear end of the latter.

As it would be unsafe to depend solely upon the connecting-rods G, together with the dcscribed connection of the tongue directly to the scraper-bar, I provide a rmer support or connection for the tongue in a bar, L, whose rear end is fastenedto the axle at .fr and also at z, preferably to the front cross-piece of frame A, as seen in the plan View, Fig. l. This bar L projects forward over the tongue nearly or quite to the end of the same, and has at its free extremity an eye-plate, M, with which engages -a curved hook, N, that is secured to the tongue, thus constituting a loose connection which allows the suitable movement of the tongue when the scraper-bar is elevated or depressed, which is always in almost a vertical direction, yet necessarily somewhat in thearc of a circle.

The double-tree Y, (seen only in Fig. 1,) is attached to the tongue some distance in the rear of the described hook-and-eye connection and in front'of the colter-wheel, as shown.

Ordinarily, as heretofore arranged, the draft comes mainly or more or less against the hook M but this will not suiiice to take the great strain which sometimes comes against the scraper. In such case the portion of standards F behind the scraper-bar serves as a support or abutment to take the severe back strain.

In lieu of bolting the steel cutting-edge E of the scraper directly upon the plane face of the main iron plate D, as is customary, I make the latter with a bend or offset, P, Fig.

3, adapted to receive the upper edge of the steel blade, which is fastened to plate D by screws or bolts q. Thus I secure astrong Hushuioint, as clearly seen in said Fig. 3.

When grading in sod ground, it is difiicult for the leading end of the scraper to tear or cut away the sod, and then it does not accomplish the work with suiieient smoothness or nicety, and in such case it is frequently impossible to keep the machine faithfully to its work. In order to obviate this defect, and also to prevent the end of the scraper from biting too deeply, I secure to the end of the scraper-bar a projecting bar, R, at the free end of which isjournaled a @citer-Wheel, WV, whose cutlingvedgeis substantially inline with the path of the end of the scraper. as clearly shown in Fig. l. Said wheel has a broad-faced circular hub, V, which is designed to ride upon the top of the ground or sod, and thus prevent the cutterV from penetrating an unnecessary depth.

I prefer to make the colter vertically adj ustable to suit the particular circumferences. This I accomplish by providing the vertical shank of the bar R on the rear side of the scraper with slots S, through which pass the retaining-bolts T. By loosening these bolts it is obvious that the said bar, and with it the colter7 may be moved up or down, and be retained at the desired adjustments.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. In a road-grader ofthe class recited, the combination of the diagonally-suspended and vertically-adjustable scraperebar, the uprights or abutments F, projecting down from the frame-work in the rear of and in proximity to said scraper-bar, the tongue secured to the scraper-bar, the bar L, rigidly attached to and extending forward from the truck of the machine, together with the hook-and-eye connection at a point between the for ard end of the tongue and the point of attachment of the double-tree, all constructed and adapted to operate substantially as and for the purpose set forth.

2. In roadgraders of the class recited, the tongue attached to the scraper-bar at a point between the middle of its length and its lead- V ing end in order to balance or equalize the draft, substantially as set forth.

In testimony whereofI have hereunto afliXed my signature this 23d day of January, A. D. 1885.

FREDERICK M. PENNOOK.

XVitne-sses:

JOHN NOLAN, FRANCIS S. BROWN. 

